Seok-Woo, a manager, she devotes far too little time to his daughter, Soo-Ann. therefore accepts to accompany from Busan to see his mother who divorced Seok may. Father and daughter board the train, KTX which will lead you to your destination. During this time, a terrible epidemic stirs up chaos in the country, turning humans into bloodthirsty zombies. A young woman manages to climb in contaminated and starts to spread the virus among passengers. Aboard the train to install panic, passengers are forced to fight for survival.